Structure
A. FlangeUse proper thickness of plate to fix at both sides or the protective curtain or the punched stiffener, and the other side should be fixed at the guide way. Normally a SPCC sheet metal is applied. Upon customer’s request, any shape, thickness, other metal or mounting method are available.
B. StiffenerThe stiffener is a PVC board (meet the RoHS) that provides a support for the inside of a protective curtain. It’s not only to reduce the contact between the protective curtain and the slideway, but also to provide a solid support, rigidity and impact-resistance. The stiffener is made from wear-resistant plastic with self-lubrication feature. The availavle thickness is 0.5 / 0.8 / 1.0 / 1.5 / 2.0 mm. Note : the increased thickness of stiffener may affect the compressed size of the protective curtain.
C. Protective Curtain
The standard material of protective curtain is a black eco-friendly material coated with PUR at both sides. It features long service life. When requested, a single side with yellow or white color is available. The protective curtain and stiffener are welded securely without sewing lines or holes. It features excellent water-resistance and oil-resistance. The material thickness of the protective curtain may vary with customers’ environmental temperature, machining condition and chemical reaction.
Restricted beltTherestricted belt is necessary to prevent over-extending of corrugation, and suitable for fast moving speed, vertical movement or large-scale protective curtain. The additional restricted belt is fitted for the protective curtain used in a closed, confined space for extending the service life of protective curtain.

A. Flange |
D. Stiffener |
B. PUR protective curtain |
E. Sliding mechanism |
C. Weld forming |
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Top quality PUR eco-friendly protective curtain/customized shapes and sizes
- Suitable for protecting precision transmission parts.
- Various cover materials to choose from.
- Available to equip with sliding mechanism and synchronized mechanism
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The Ultimate Protector for Machine Slideways
DEFENDER means protector. In football sport, it means the defensive players. The brand name of SUN YUAN’s machine protection system was originated from “The best defense with the most effective protection. “The company’s logo is a simple square graphics in combination with equal sloping sides, that exhibits in-depth meaning of the company’s identification system. The equal length of four sides represents the company’s internal culture - mutual concern, mutual trust, mutual toleration and mutual growth. The company’s philosophy is “honesty and Responsibility; Professional Team Work; Excellent Quality; Technology Innovation, the logo also represents the bellows cover produced when the company was established.
SUN YUAN Technology was established in 1989. For over 20 years, SUN YUAN has been dedicating to the development of the protection covers for machine slideways. Our development of product begins from the simple bellows cover to the latest extra high speed finned bellows cover. The design and production concept behind SUN YUAN products is to extend the machine service life for our customers. SUN YUAN is committed to become the best protector for machine slideways, and our products will be the first protectors for machine slideways.
A Perfect Combination of Technology And Technique
In addition to constantly develop various new performance and new types of protection covers for application in general industries, SUN YUAN also research and design protection covers for application in the field of high-tech industry. Through constant breakthrough and innovation of technology. SUN YUAN products has won a number of patents in Taiwan, Europe, U.S.A. and Japan, etc.
Environment - Friendly Without Second Pollution
In today’s society, environmental consciousness is enhanced seriously, and fulfill environmental care is the responsibility for every enterprise. Therefore, SUN YUAN products are all manufactured from eco-friendly materials. For example, the protective curtain is produced from PUR eco-friendly material and the stiffener is produced from non-poisonous PVC material that meets RoHs standards, and keeps SUN YUAN protection covers free of second pollution to environment.
Customized Design And Manufacturing Capabilities
Upon customer’s requirement, SUN YUAN is also capable of design and manufacture of special specifications of protection covers that fully meet customers’ required specifications and performance.
Rigorous Quality Control Insisting on Quality Excellence
In addition to the use of top quality materials, SUN YUAN also employs the latest forming technology in combination with the rigorous quality control system. From material incoming inspection, in-process inspection to final product inspection, rigorous quality standards are followed that ensure SUN YUAN products to achieve the international quality level.
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